Came across this post and felt the need to answer the questions as to whether the chart is gallons, liters, per day, per week, etc.
It's gallons used for doing the activity one time.
Why do I say this?
If you look at flushing the toilet, it says 1.5 for a low-flow toilet, and 5 for a standard toilet. That's how many gallons toilets have in their tanks and therefore use each time you flush. Not per day OR week. Each time you do the activity. So brushing your teeth might happen twice a day. Some things may only happen once a week, like laundry, though it may be 3 loads. 30 gallons is what they're saying a typical washing machine uses for one load.
They want you to write in the # of times you did something each day under Sunday, Monday, Tuesday, etc. Then add them up under "total number of times" (brushing teeth 2x/day, all week, would be 14). Then we see the pre-printed column of how many gallons (they say!) are used each time you do the thing. Then you'd multiply that times how many times you did it, and you'd get how much water you used for the week.
Obviously many of us use way less than they estimate! If any of us wanted to use that chart, we should change the numbers in that pre-printed column to reflect how many gallons or liters we actually use. I wet my toothbrush with a quick tiny bit of water, then turn it on again to rinse, using a small trickle for 3 quick 'rinse & spits'. When I visit a particular place where I use bottled water, I use about 1/4 cup. I then turn on the faucet for a moment to rinse the sink where I spit, so I'd estimate brushing my teeth uses about 1/2 cup of tap water and 1/4 cup bottled there.
My husband suggests that to estimate shower usage, if you have a shower head you can take down, put it in a 2 gallon or 5 gallon bucket and time how long it takes to fil it up, then time how long your showers are, and do whatever figuring you have to. Or run the water for 1 minute and measure how much water that is, then multiply times 10 for a 10 minute shower, etc.
To answer the OP, if they're still around:
My numbers would all be less except drinking water. We use bottled water for drinking and for cooking in instances where we consume the water used (noodles, rice, soup, coffee, tea, etc. We use tap water for boiling eggs because it doesn't get in the egg). We average a little less than 1 gallon per day between drinking and cooking. It varies, so when we plan & shop, we assume 1/day. I wouldn't include that in this chart, which seems to be for estimating an onsite source like a well, or even city water.
No dishwasher.
We don't water a lawn, though we water a garden on occasion in the heat of summer, so that is super-variable.
No baths, either, just showers. Low flow shower head, low flow toilet (max allowed for sale in the US is 1.28 gallons nowadays, by law)
We argue about how to do dishes, with me letting the water run and my husband shutting it off while soaping them up. But his don't always come out clean.
I don't really wash my car. Maybe a couple times a year I might go to a car wash, and that's stretching it. I often imagine I'm going to wash it but I never do, then when a big rain comes I park it out in the open, not under my usual tree. I've also imagined going out and soaping it up as the rain starts and then letting the rain rinse it, but I never do that either. This past winter while cleaning snow off it, I used the snow brush and snow to scrub along the bottom and the tires. I thought that was pretty clever of me.
It was surprisingly shiny with no soap!
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